Congenital abnormalities in Brazilian children associated with misoprostol misuse in first trimester of pregnancy - Gonzales, Claudette Hajaj; Dias, Maria Joaquina Marques; Kim, Chong Ae; Sugayama, Sofia Mizuho Miura; Paz, José Albino da; Huson, Susan M; Holmes, Lewis B (The Lancet, 1998)